In this scenario, the Exchange email account settings dialog box is changed, and the Microsoft Exchange dialog does not include a Connection tab. The location of this dialog box is as follows: File -> Account Settings -> Account Settings -> Settings

Cause

When an account is enabled for MapiHTTP, it is expected that the Connection tab be removed.

Resolution

If this tab must be temporarily re-enabled for troubleshooting, add a registry key by following these steps:

Exit Outlook if it is running.

Open Registry Editor.

Open the Run box.

For Windows 8, press the Windows key + R.

For Windows 7 or Windows Vista, click Start, and then click Run.

Type Regedit.exe, and then click OK.

Locate the following key in the registry:

HKEY_CURRENT_USER\Software\Microsoft\Exchange

Select the key that was specified in step 3, click the Edit menu, point to New, and then select DWORD Value.

Type MapiHttpDisabled as the name of the DWORD Value, and then press Enter.

Right-click MapiHttpDisabled, and then click Modify.

In the Value data box, type 1, and then click OK.

Close Registry Editor.

Start Outlook.

More Information

We recommend that you remove this registry key as soon as testing is completed. This key should only be used for testing and is not a long term solution.